Metal tetrachlorocrotonate compounds and methods of preparation thereof

ABSTRACT

CIS-2,3,4,4-TETRACHLOROCROTONIC ACID IS REACTED WITH A SELECTED METAL COMPOUND FORM THE CORRESPONDING METAL TETRACHLOROCROTANATE. ALSO A METAL TETRACHLOROCROTONATE MAY BE REACTED WITH A SECOND METAL COMPOUND TO FORM A SECOND METAL TETRACHLOROCROTONATE COMPOUND.

t 89 METAL TETRACHLOROCROTONATE COM- POUNDS AND METHODS Oi -PREPARA- TION THEREOF Frank R. Haglid, l Crestficld Read, Y Crestfield, Wilmington, Del. 810 I No Drawing. Filed Jan. 25, i971, Ser. No. 109,585

' Int. Cl. C07f 13/00. 15/00; C07c 57/08 ll Claims US. Cl. 260-429 R AnsTRAcT or Tm; msctosum; Cis-2,3,4Q4-tetrachlorocrotonic acid is reacted with a selected metal compound to form the corresponding metal tetrachlorocrotonate. Also a metal" tctrachloroerotonate Patented Apr. 9, 1974 with a water immiscible brganic solvenulhe reaction is represented by the following equation:

may be reacted with a second metal compound to form-- a second metal tetrachlorocrotonate compound. r

SUMMARY OF THE INVENTION This invention relates to-novcl compounds which are useful as plant bactericidcs, herbicides, flame retardants. and for the extraction of metal ions. The compounds of this invention are represented by the formula:

where n is a whole number selected from the group consisting of l, 2,"and 3; and 1 o M is a cation of an element selected from the group consisting or Li, Na. K. Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, I Ra. Sc, Y, La. Ac. Ti. Zr. Ht, V, Nb, Ta, Cr. Mo, W,

Mn, -Tc.-Re. Fe. Ni. Co, Ru, Rh. Pd, Os. lr. Pt. Cu, Ag. Au. Zn, Cd, Hg. Al, (in, In, Tl. Ge, Sn, lh. Sb, Bi. P0, Ce. Pr, Nd, Pm, Sm, Eu, Gd. Tb. Dy, l-io. Er, 'l'm. Yb. Lu, Th, Pu, U. Np, Am, Cm, Bit. Cf,-Es. Em, Md, and Lw.

The elements M listed above represent all the elements tahulated 'in the Periodic Table with the exclusion of those elements having atomic numbers 1, 2, 5-10. 1448, 33-36, 52-54. 85 and 86 as identified. for example, in

Lange's Handbook of Chemistry, 8th ed.. pp.56-57. For 7 the purposes of this disclosure, the above elements are" defined to be metals. I

This invention further relates to a proccss'of preparing the. compounds of Formula 1 wherein cis-2,3,4,4-tctra- ,chlorocrotonic acid. hereinafter referred to as tetrachlorocrotonic acid, is treated with a com ound of the formula Mk where M and n arc defined its above. and R is o'tvgen, hydroxide, alltoxide or an anion of a weak acid with a pKa of L9 or greater. Use of unions of stronger acids usually reduces the yield.

DESCRIPTION OF THE INVENTION A of tetrachlorocrotonic acid in. water and/or an organic solvent. In some instances when water is employed as the s vent phase, the tctrathlorocrotonic acid, compound which-"is formed docs not separate. in which case it is then isolated from the reaction mixture by extraction where n. M and R areas defined above.

It will be understood by those skilled in the art that actual stoichiometry of both the'reaction equation and the reactants MR and products HR will depend-on the particular cations and; anions involved in the rcaction.

Illustrative of this reaction tctrachlorocrotonatc:

(a), r v '-c1-c-cucu Cl-C-CIlCh M l ll u 211:0 Che-4.10011 ct-c-cooa It will also be understood that the metal compounds of tctrachlorocrotonicacid can also be formed from another metal compound of tetrachlorocrotonic acid, preferably from the alkali metal compounds (sodium',-potassium or lithium), by mixingequivalcnt amounts of the metal tetrachlorocrotonate starting material with a' starting material'containing the desired cation M in the presence of a solvent. If water-is used asthc solvent phase and the metal tetrachlorocrotonate product does not separate, it is isolated by extraction with a water immiscible organic solvent. This reaction is represented by'the following equation: i

where n and p are whole numbers selected from the gr up con- 5lslil.g of l, 2 and 3;

N and Z are cations of elements selected from the group consisting of Li, Na, K, Rb, Cs, Fr. Be, Mg. ca, Sr, Ba. Ru. Sc. Y, La. Ac, Ti, Zr, Hf, V, Nb. Ta, Cr, M0, W, Mn, Tc, Re, lie Ni, Co, Ru, Rh. Pd. Os,;Ir, Pt. Cu. Ag. Au. Zn. Cd, Hg, Al, On, In, Tl. Ge, Sn, Pb ,.Sb.. Bi. Po, Ce, Pr. Nd. Pm. Sm; Eu, Gd. Tb, Dy, Ho. Er, 'Im.

5 Yb. Lu, Th. Pa. U, Np, Pu. Am, Cm. Blt,"Cf, Es, Fm,

Md, and Lw, with the proviso that N'and Zar'e different; and v 1 I X is an union of a weak or, strong acid.

It will be understood by those skilled in the artthat the actual stoichiomctry' of the reaction equation and the reactants, NX and products ZX will depend on the particular cations and anions involvedin the reaction.

Illustrative of this reaction is the synthesisof nickel tctrachlorocrotonatc from sodium ietrachlorocrotoniue:

partitioning-of individual 'inetal telrachIorocrotonntcs be tween organic and aqueous phases can lac-used toadvantage to force the reaction toward formation oiuhe new tctrncltlorocrotonatc as well as to separate. tho'tlesired product from hy-nrotlucts and/or unrei' led mnlcrials. I z v Thetemperature cmplo ctlin carrying outll process ol-tliisimention can he as low as the freezing point oldie is the synthesisof calcium ethanol, methanol, nitrobenzene, acetonitn'le. nitromcth- 1" ane. and N,N-dimethyliormamidc. Water can also be used as a solvent as can mixtures of two or more of the above solvents with the proviso that when one of the solvents is water, the organic phase will ordinarily be a water immiscible liquid. The preferred solvents are water, diethyl ether and chloroform.

The solvents can be used in concentrations as low as 0.5 parts of solvent per part of tetrachlorocrotonic acid introduced into the process. However, amounts of solvent from about 100 to 500% of the weight of tetrachlorocrotonic acid will normally be used. Greater amounts of solvent can of course be used, even as high as l000% to 5000% based on the tetrachlorocrotonic acid, but such amounts merely dilute the components in the reaction mass with no particular advantages obtained.

Well dcfined'crystallinc metal compounds of tetrachlorocrotonie acid with melting points in the range of 100 to 200 C. are-obtained by evaporation of the solvent from essentially anhydrous organic phases containing the compounds or by addition of a second solvent of low polarity such as hexane to the organic phase, which causes precipitation of the metal compounds.

In general, the stability of the compounds of this im vention is good. As solids, they are highly stable below their melting pointsand they can be stored for prolonged periods as solutions in organic solvents. In aqueous solu tions and especially under alkaline conditions, the stability is shortened. Sodium tetrachlorocrotonate in dilute aqueous solution at pH for instance, has a half-life of 2 to 3 weeks at room temperature.

The following examples are presented to further illustrate this invention. In the examples parts and percentages are by weight unless otherwise specified.

Example 1 Ten parts tctrachlorocrotonic acid is neutralized with 1.8 parts sodium hydroxide in 30 parts of water at C. The resultingsolution is evaporated to drynessin vacuum at 80 C. The residue is dissolved'in 30 parts diethyl ether. The resulting solution is diluted with 100 parts n-hexane and the precipitated sodium tctrachlorocroto nate. MP. 145-149 C., is isolated by filtration.

Example 2 By substituting 1.7 parts calcium hydroxide for the sodium hydroxide used in Example 1, calcaum tetrachlorocrntonato is obtained. MP. 148-l5l C.

I Example Ten parts tetrachlorocrotonie acid is mixed with 4.5

parts cupric acetate monohydrate and 50 parts diethyl other. The mixture is agitated for .15 minutes at room' Example 4 Ten parts tetra chlorocroionic acid is mixed with 5.5

parts manganottslaeelatettetrahydrate and=50 parts chlo- "rotorm. The mixture is agitated for 15 minutes. The resulting solution is 'c'vaporatcdto dryness and the residueis dissolved 'in parts chloroform. The resulting solution is diluted with 100 parts n-hcxanc and the precipiasostas tated manganous tctrachlorocrotonate, MP. B9 162 C.,

is isolated by filtration. f

Eatarnple s Tc'n"parts'tetrachlorocrotonie acid is mixed with parts zinc acetate dihydrate and 50' parts diethyl ether.-.

The mixture is agitatedfor l5 minutes and is then evapo- 'rated to dryness, The residue is dissolvedin 20" parts diethyl ether and the resulting solution is diluted with 100 arts n-hcxane and the. precipitated zinc tetrachlorocrotonatc, M.P. l31 -l37 C., is isolated by filtration.

- Example 6 Ten parts tetrachlorocrotonic acid is neutralized with 1.8 parts sodium hydroxide in 35 parts of water at 15 C. To the resulting solution is added l parts diethyl ether and ,4.2 parts ferric sulfate nonahydrate'with stirring at room temperature. After about minutes, the ethereallayer is separated and washed with 50 parts of a saturated aqueous sodium chloride solution. The ethereal layeris separated, driedover anhydrous sodium sulfate and evaporatcd to dryness. The residueis dissolved in 20 parts of vbenzene. The resulting solution is diluted with lOO parts of n-hexane and the precipitated ferric tetrachlorocrotonate, MP. 89-14 C., is isolated by filtration.

Example 7 Ten parts tetrachlorocrotonic acid is ncutralizedwith 1.8 parts sodium hydroxide in parts of water at 15 C.

To the resulting solution is added l25 parts diethyl ether and 4.5 parts aluminum sultate [Al (SO -l8I- .IO] with- 4 benzene followed by dilution with lOO parts of n-hexanc to precipitate aluminum tetrachlorocrotonate, M.P. 300 C. with decomposition, which can be isolated by filtration.

Example I 8,

Ten parts tctrachlorocrotonic acid is neutralized with 1.8 parts sodium hydroxide in 35 parts of water at 15 C.

. To the resulting solution is added 125 parts diethyl ether and 4.5 parts chromic sulfate C7t" (SO,) -lSl-I,O] with stirring. .Afterabout 30 min'utes,the ethereal layer isseparated and washed with parts of a saturated aqueous sodium chloride solution. The ethereal layer-is separated, dried over anhydrous sodium sulfate. and evaporated to dryness. The residue is dissolved in 20 parts of benzene followed by the addition of 100 parts of n-hexane to "precipitate chromium tetrachlorocrotonate, MI. 'C., which can be isolated by filtration.

Example 9 Ten parts tetrachlorocrotonic acidis neutralized with 1.8 parts sodium hydroxide in 35 parts of water at 15 C. To the resulting solution is added .parts diethyl ether and 5.6- parts nickelous-acctate ,tetrahydrate with stirring.

' After about 30 minutes, the etherallaye'r is separated and tetrachlorocro'tonate, M.P. MB-152 Cl. which can be isolated by filtration. Example l0 lly substituliniz molecular equivalent amounts of the metal compounds shown below for the sodium hydroxide in" Example l, the corresponding .metztl tctruchlorocrotonute is obtained.

lotassiuntrnetltox iiie Potassium t ctraehlorocrotonate.

tiuiium carbonate Lithium uneconomic. Magnesium hydroxide Magnesium tetrachlorocrotonate Strontium oxide In--- Strontium tetraehtorocrotonate. liarium hydroxide nn. Barium tetrachlorocrotonate.

Example it.

bench. the cu'cumben plawd in a inoculationfl'he under side: of the leaves jpoued. eu etanbetf plank-After drying h i chamber for 16 hours where they are tire-conditioned tor m it tl lacnwmans.

bylspraying witha suspension oiPseudomonar flheeucumbcriplants are returned to thehuruiditycham' her where they remain "for a four-day incubation period.

' By substituting molecular equivalent amounts of the I metal compounds shown below for the anode acetate in Example}, the corrcspondjnn metal tetrachlorocrotonate in obtained.

Metal compound: Silver acetate Silver tetrachlorocr'otonate.

Cadmium 'acetate Cadmium.tetrachlorocrotonate.

, Cobalt acetate Cohalt.tetrachlorocrotonate. 'Cerium acetate Cerium tetrachlorocrotonate. Uranyl acetate Uranyltetrachlorocrotonatc.

e ii'nipte 12 By substituting "molecular equivalent. amoitnts of the metal compounds shown, below for the ferric sulfate nonahydrate in Example 6, the corresponding metal tetrachlorocrotonate is'obtained.

Metal compound:

.Scandium sulfate Scandium tetraehlorocrotonate. Titanium'chloridc Titanium tetrachlorocrotonate. Vanadyl sulfate Vanadyl tetrachlorcrotonate. lolonium chloride Polonium-tetrachloroerotonate. Lead acetate Lead tetrachlorocrotonate.

Tin chloride c 'lin tetrachloroerotonate. Antimony chloride Antimony tetrachlorocro'tonate;

As indicated above, the compoundsof this invention are useful (or vthe extraction of metal, ions. This utility may be applied in analytical procedures or in industrial scale separations such as for the rare earth metals. Table I is presented below to demonstrate the manner in which the atomic number and-valency oit'he metal ion affects the water solubility, other solubility, and partition coefficient of the indicated tetrachloroerotonie acid com:

. pound.

'IAliLlil tioiuhlllty per 2 .too piirts 'l'nrtltluu I covlilrlt-ut. 'lt-tmclilorotrrnlonnlo I110 Ether ether/water Sodium 150 5 W3 t'nlrluut' -70 llh L5 ('ottpt'r"..... l 12f) '20 Aluminum l 05 43 As indicated above,'the compoundsof this invention are useful as plant hactericides. Therefore. one emhodi merit of. the invention is the application ofa compound of Formula 1 to'plants to protect said plants from bacteria Metal tetrachlorocrotonate Metal tetrachlorocrotonate y cities to selectively control annual grasses anda; number of broad-leaf weeds: lnone' embodiment of this invention The treatedcucumbers remain healthy and areiyirtually tree from the characteristic angular lesions otjthe disease.- In contrast, the inoculated leaves of the untreated;seentrols are practically covered by oozing. coalescing lesions. which upon drying leave holes in the foliage.

Compoundsot this invention are also useful as heriba formulationconsisting of the following is prepared? v l'ereent ,lron tris(tetrachlorocrotonate) Dialkyl ester of sodium suliosu'ceinic acid- 2 -Sodium-ligninsulfonate f 3 Attapulgite -4. 35

The above ingredients are blended and then ground in a hammer mill to give a water dispersihle powder. The

resulting formulation is suspended at the rate of. ta ;itil0- grams per 200 liters ofwater. This volume is thenispraycd uniformly over one hectare of established, clipped-bluegrass turf. Application is timedtto coincide with the onei inch stage ofcrtthgrass (Rigitaria spa). Emerged crabsuch Iseurlomonas Iucrymrms which incites cucumber 7 angular leaf spot, )t'rmlImnm/ras'nilllvmsenrum which incites cotton angular leaf spot lirwiniu nmylovora which incite-s pome fruit fire blighh'and theliltc. ln-one embodiment of this invention a formulation consisting of the following is prepared:

A blend of polyethylene ethers and oil soluhle nuii'ottates Xylene --s-.

The above ingredients are stirred together until=a homogeneous solution results. The solution iet'then suapcndcdin water. at concentrations of lift and 16 parts per trtillion. active material. The suspensions arc sprayed to ".tlie point of run off onto all leaf surfaces of young,

til

. Percent Calcium tctrachiorocrotonate -s 20 Tetrahydrofuran -m. 7

grass. 'chicltwecd (Stt'llurir, media) andhcnbittLamium amplcxicaulv) are controlled; Residual pro-emergence crabgrass control is also obtained with little effect on bluegrass. 1

Ccrtain of the compounds of this invention are also uscfulas flame retardants. 'llteymay be incorporated,

for example, into synthetic or natural polymers such as fibers, fabrics and plastics with '21 resulting decrease in the combustability ht said nuttcrials. The tin. antimony. and zinc tetrachlorocrotonzttes are especially useful for this purpose.

What is claimed is:

l. A-compound selcctcdfrom the group'consisting of calcium tetrachiorocrutonate, cupric tctrachlorocrotonatct manganous tctrachlorocrotonate. zinc tetrnchlorocro tonate, ferric tetrachloiocrotonate, aluminum tctrachloroerotonate, chromium tetruchlorocrotonute*and nickelous tetrachloroerotonate. I

2. The compoundof claim 1 which is calcium tetra- 'chlorocrotouate.

chlorocrotonate.

10. The process for preparing it metal tctrttchlomcro- .tonate compound comprising the steps of:

(a) contacting a compound selected from lithiumtetra ehlorocrotonate, sodium tctt'nchiorocrotonate and potassium telinchlorocrotonatc with u'ctnnpound of v the formula NI-( where t is it whole number so lcetetl from the group consisting oi land 3-; N is the culiott of a metal selected from calcium. copper, luau gancsefzinc, iron, ttltuuinum, chromium ur-nicltcl.

and X is an anion of a weaker strong acid; it: the presence of water; and p I (b) isolating the product compound of the formula ct-c-cucu N [Cl-(I-COO']. where n and N are as above defined by'the steps of (c) extracting said product compound from the reaction mixture into a water immiscible organic solvent selected from dicthyl ether and chloroform;

(d) separating said water immiscible organic solvent containing the product compound from said reaction mixture; and

(e) isolating. said product componnd from-:said water immisible organic solvent.

II. The process for'preparing a metal tet'rachlorocrotonate comprising the steps of:

(a) contacting tetrachlorocrotonic acid with a compound of the formula MR where M is the cation of ametal selected from calcium, coppeigmanganese, zinc chromium nickel, ironqorz aluminum; n is a whole number selected from the group consisting of 2 and 3; and R is oxygen, hydroxide, alkoxide, or an anionof a weak acid with a pKa of 1.9 or greaterin the presence of water; and (b) isolating the product compound of the formula [cl-cecncu 1 N" cl-c -coon 71-97; 252-8.1; 260-4294, 429.2, 42913, 429.5329], 429.9, 430, 431, 435 R, 43s.x, 438.5 R, 439 R,Q44'O', 446.

' r 8 ,1 v a where r: and M are as above defined hy'the stepsol' (c) evaporatingsaid water to leave: residue containlng snidreaction product; I l v (d) contacting said residue with an organic solvent to dissolve said reaction product; and (c) isolating said reaction product from said organic solvent.

References Cited V UNITED STATESPATENTS 5/1952. Chadwick 260-539 R 2,874,176 2/1959 .Mills et al. -2 2609439 R 3,335,159 8/1967 Remcs et al. 260-446 FQREIGN PATENTS 2/1958 Germany. v

. OTHER REFERENCES: Mafll'tS: Liebig's Annalen der Chemi e 686 (1965 pp. 55-63.

-0 v J DANIEL E. WYMAN, Primary Examiner a. RDEMERS, Assistant Examiner us. cl; x R.

m haw gas-mo wjesa) ril Date A Inventofls) Ffahk it is certified Em: errbreypiaeaw in the above-identifiefl patent and that said Lei.-1.'.e"1:e; Patent arehereuy cdwectadas shown beluw:

In Column 7, Claim 11, the fermu'la should appear as follows C-CHCl Z Y e, n+ I Signedand sealed this 10th day of September 1 97M.

C-COO (SEAL) Attest @001 M. GIBSON, R.-

MARSHALL DANN Attesting Officer Commissioner of Patents A2222? v xma ao 5mm GFFECE I CERTIEfiQATEXQF QGRRECTION Inventor (s Mk R. Ha qiid if is certifid that error appears in the above-identified patent and that said liette'cs Patent are hereby corrected-as shown below:

In Colum'7, Claim 11, the formula should appear as follows:

. [ol-c-cnol I. lEl-G-COO Signed and sealed this .fiOth day of September-197A.

(SEAL) Attest: I

McCOY'IZI. GIBSONQJR; c. MARSHALL DANN .A' testlng Offic er Commissioner of Patents 

